RA8875/ESP32S3: artifacts and strange offsets

I am new to LVGL but I managed to adapt following demo to support RA8875 7" LCD from Waveshare running on ESP32S3 DevkitC: esp-idf/examples/peripherals/lcd/i80_controller at master · espressif/esp-idf · GitHub

I am using following esp-idf component as RA8875 driver: IDF Component Registry

I am getting artifacts and strange offsets, it is most visible on the CPU load and FPS counter because it is re-drawn periodically. Please check following video: https://photos.app.goo.gl/PyCyeX53Jz463BeRA

I know I should probably ask on Espressif forum, but I will ask people experienced with LVGL first - what might be the cause? Is it some buffer overflow, issue with implementation of ra8875 driver component for esp-idf or something else?